EDIT: Early reports indicated an AR-15 was involved in the Navy Yard shooting. That turns out to be false, but it hardly changes anything. If Aaron Alexis was able to so easily kill 12 people without an AR-15, I don’t want to think what would have happened had he used an assault rifle (yes, that’s what it is). The amount of carnage possible even with less potent weapons lends even greater support to banning assault style weapons.